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---
lang: en
title: 'API docs: authentication-passport.strategyadapter._constructor_'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/extensions/authentication-passport
permalink: /doc/en/lb4/apidocs.authentication-passport.strategyadapter._constructor_.html
---
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
[Home](./index.md) > [@loopback/authentication-passport](./authentication-passport.md) > [StrategyAdapter](./authentication-passport.strategyadapter.md) > [(constructor)](./authentication-passport.strategyadapter._constructor_.md)
## StrategyAdapter.(constructor)
Constructs a new instance of the `StrategyAdapter` class
<b>Signature:</b>
```typescript
constructor(strategy: Strategy, name: string, userProfileFactory?: UserProfileFactory<U>);
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| strategy | Strategy | instance of a class which implements a [passport-strategy](http://passportjs.org/)<!-- -->. |
| name | string | |
| userProfileFactory | [UserProfileFactory](./authentication.userprofilefactory.md)<!-- --><U> | |